NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 203
ONVOY, LLC - CT 5
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-03-09 203-892-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2011-03-09 203-892-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2011-03-03 203-542-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2011-03-03 203-690-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2011-02-28 203-212-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2011-02-28 203-360-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2011-02-28 203-501-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2011-02-28 203-501-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2011-02-28 203-501-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2011-02-25 203-212-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 BRIDGEPORT CT
2011-02-24 203-681-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BYRAM CT
2011-02-23 203-302-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-02-23 203-485-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-02-23 203-485-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-02-23 203-538-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2011-02-17 203-501-2XXX 2000–2999Assigned METROPCS, INC. 5562 DANBURY CT
2011-02-17 203-501-4XXX 4000–4999Assigned METROPCS, INC. 5562 DANBURY CT
2011-02-17 203-501-5XXX 5000–5999Assigned METROPCS, INC. 5562 DANBURY CT
2011-02-17 203-501-6XXX 6000–6999Assigned METROPCS, INC. 5562 DANBURY CT
2011-02-17 203-572-9XXX 9000–9999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-726-1XXX 1000–1999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-726-2XXX 2000–2999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-726-3XXX 3000–3999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-726-4XXX 4000–4999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-726-5XXX 5000–5999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-726-6XXX 6000–6999Assigned METROPCS, INC. 5562 BRIDGEPORT CT
2011-02-17 203-941-9XXX 9000–9999Assigned METROPCS, INC. 5562 SEYMOUR CT
2011-02-11 203-818-8XXX 8000–8999Assigned METROPCS, INC. 5562 NORWALK CT
2011-02-10 203-519-0XXX 0000–0999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-1XXX 1000–1999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-2XXX 2000–2999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-3XXX 3000–3999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-4XXX 4000–4999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-5XXX 5000–5999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-6XXX 6000–6999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-10 203-519-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2011-02-07 203-361-0XXX 0000–0999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2011-02-07 203-361-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2011-02-07 203-361-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2011-02-07 203-361-5XXX 5000–5999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2011-02-07 203-443-4XXX 4000–4999Assigned METROPCS, INC. 5562 MERIDEN CT
2011-02-07 203-465-5XXX 5000–5999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-07 203-565-0XXX 0000–0999Assigned METROPCS, INC. 5562 WATERBURY CT
2011-02-07 203-704-6XXX 6000–6999Assigned METROPCS, INC. 5562 WOLCOTT CT
2011-02-07 203-892-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2011-02-04 203-403-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 RIDGEFIELD CT
2011-02-04 203-989-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAMFORD CT
2011-01-31 203-443-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MERIDEN CT
2011-01-31 203-717-1XXX 1000–1999Assigned CSC VOICE, LLC 612K GREENWICH CT
2011-01-31 203-822-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.